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TECHNICAL PAPERS: Internal Combustion Engines

Studies of Spray Breakup and Mixture Stratification in a Gasoline Direct Injection Engine Using KIVA-3V

[+] Author and Article Information
Dennis N. Assanis, Sang Jin Hong, Akihiro Nishimura, George Papageorgakis, Bruno Vanzieleghem

W. E. Lay Automotive Laboratory, University of Michigan, 1231 Beal Avenue, Ann Arbor, MI 48109-2121

J. Eng. Gas Turbines Power 122(3), 485-492 (Jan 07, 2000) (8 pages) doi:10.1115/1.1286675 History: Received December 12, 1998; Revised January 07, 2000
Copyright © 2000 by ASME
Topics: Sprays , Fuels , Engines , Turbulence
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References

Figures

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Vertical and horizontal views of combustion chamber, and perspective view of the grid at TDC
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Consecutive snapshots of velocity profiles (left) and equivalence ratio contours (right) shown at (a) 30 deg BTDC, (b) 20 deg BTDC, and (c) 150 deg BTDC. Case A: baseline configuration with injection timing=40 deg BTDC and tumble ratio=1.0.
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Comparison of velocity distribution (left) and equivalence ratio contours (right) at the point if ignition (15 deg BTDC) for different tumble strengths and injection timings. Case B: tumble ratio=0, injection at 40 deg BTDC; Case C: tumble ratio=2, injection at 40 deg BTDC; Case D: tumble ratio=1.0, injection at 60 deg BTDC).
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Equivalence ratio near the spark plug for tumble ratio varied from 0 to 2
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Equivalence ratio near the spark plug for varied injection timings
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Visualization of computed spray droplet distribution using LPB model (left) and TAB model (right) every 2 ms starting at t=2 ms. Experimental spray images 23 at 1, 4, and 6 ms for the modeled conditions
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Comparison of spray tip penetration computed using the TAB and LPB models with experimental data 23
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SMD comparison with experimental data for combinations of LPB and TAB with k-ε and RNG turbulence models
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Average total velocity distribution computed with LPB and k-ε models for three increasingly dense grids

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